主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2011, Vol. 27 ›› Issue (4): 34-38.doi:

• 论文 • 上一篇    下一篇

大连市蒸发量变化特征及影响因子

赵冬艳   

  1. 大连市气象局,辽宁 大连116001
  • 出版日期:2011-08-30 发布日期:2011-08-30

Characteristics of variations of pan evaporation and its influencing factors in Dalian, Liaoning province

ZHAO Dong-yan   

  1. Dalian Meteorological Service, Dalian 116001, China
  • Online:2011-08-30 Published:2011-08-30

摘要: 采用线性倾向估计法、累积距平曲线和完全相关系数法,分析了1951—2001年大连市蒸发量的变化特征及其影响因子。结果表明:大连市年蒸发量呈增加趋势,其中夏季蒸发量的增加趋势最为明显,其次为春季,秋季和冬季蒸发量增加趋势不显著;年蒸发量的增加主要来自夏季的贡献。大连市年及四季蒸发量与日照时数、平均地面温度、平均气温日较差和平均风速总体上呈正相关,与平均相对湿度呈负相关。平均相对湿度减小和平均地面温度上升是大连市蒸发量增加的主要原因。

关键词: 蒸发量, 影响因子, 大连市

Abstract: The characteristics of variations of pan evaporation and its influencing factors from 1951 to 2001 were analyzed in Dalian in terms of methods of a linear tendency estimation, an cumulative anomaly and a complete correlation coefficient. The results show that the annual pan evaporation has an increasing trend. The trend is significant in summer, followed in spring. However, it is not significant in autumn and winter. Summer pan evaporation is the main contributor to annual pan evaporation. Annual and seasonal pan evaporation is positively correlated with the sunshine duration, average surface temperature, diurnal range of average temperature and average wind speed, and negatively correlated with average relative humidity. The decreasing average relative humidity and the increasing average surface temperature are the major reasons for the increasing pan evaporation in Dalian.

Key words: Pan evaporation, Influencing factors, Dalian